From 6245acea848392861c2cd175d0292ef6b4f6638e Mon Sep 17 00:00:00 2001
From: Daniel Drake <dsd@cs.manchester.ac.uk>
Date: Mon, 19 Nov 2007 18:29:26 +0000
Subject: [PATCH] Add API to delete enroll data

---
 libfprint/data.c   | 43 +++++++++++++++++++++++++++++++++++++++++++
 libfprint/fprint.h |  2 ++
 2 files changed, 45 insertions(+)

diff --git a/libfprint/data.c b/libfprint/data.c
index 79d161d..c36f94d 100644
--- a/libfprint/data.c
+++ b/libfprint/data.c
@@ -25,6 +25,7 @@
 #include <unistd.h>
 
 #include <glib.h>
+#include <glib/gstdio.h>
 
 #include "fp_internal.h"
 
@@ -357,6 +358,28 @@ API_EXPORTED int fp_print_data_load(struct fp_dev *dev,
 	return 0;
 }
 
+/** \ingroup print_data
+ * Removes a stored print from disk previously saved with fp_print_data_save().
+ * \param dev the device that the print belongs to
+ * \param finger the finger of the file you are deleting
+ * \returns 0 on success, negative on error
+ */
+API_EXPORTED int fp_print_data_delete(struct fp_dev *dev,
+	enum fp_finger finger)
+{
+	int r;
+	gchar *path = get_path_to_print(dev, finger);
+
+	fp_dbg("remove finger %d at %s", finger, path);
+	r = g_unlink(path);
+	g_free(path);
+	if (r < 0)
+		fp_dbg("unlink failed with error %d", r);
+
+	/* FIXME: cleanup empty directory */
+	return r;
+}
+
 /** \ingroup print_data
  * Attempts to load a stored print based on a \ref dscv_print
  * "discovered print" record.
@@ -639,3 +662,23 @@ API_EXPORTED enum fp_finger fp_dscv_print_get_finger(struct fp_dscv_print *print
 	return print->finger;
 }
 
+/** \ingroup dscv_print
+ * Removes a discovered print from disk. After successful return of this
+ * function, functions such as fp_dscv_print_get_finger() will continue to
+ * operate as before, however calling fp_print_data_from_dscv_print() will
+ * fail for obvious reasons.
+ * \param print the discovered print to remove from disk
+ * \returns 0 on success, negative on error
+ */
+API_EXPORTED int fp_dscv_print_delete(struct fp_dscv_print *print)
+{
+	int r;
+	fp_dbg("remove at %s", print->path);
+	r = g_unlink(print->path);
+	if (r < 0)
+		fp_dbg("unlink failed with error %d", r);
+
+	/* FIXME: cleanup empty directory */
+	return r;
+}
+
diff --git a/libfprint/fprint.h b/libfprint/fprint.h
index 20f0545..639c963 100644
--- a/libfprint/fprint.h
+++ b/libfprint/fprint.h
@@ -80,6 +80,7 @@ void fp_dscv_prints_free(struct fp_dscv_print **prints);
 uint16_t fp_dscv_print_get_driver_id(struct fp_dscv_print *print);
 uint32_t fp_dscv_print_get_devtype(struct fp_dscv_print *print);
 enum fp_finger fp_dscv_print_get_finger(struct fp_dscv_print *print);
+int fp_dscv_print_delete(struct fp_dscv_print *print);
 
 /* Device handling */
 struct fp_dev *fp_dev_open(struct fp_dscv_dev *ddev);
@@ -199,6 +200,7 @@ int fp_print_data_load(struct fp_dev *dev, enum fp_finger finger,
 int fp_print_data_from_dscv_print(struct fp_dscv_print *print,
 	struct fp_print_data **data);
 int fp_print_data_save(struct fp_print_data *data, enum fp_finger finger);
+int fp_print_data_delete(struct fp_dev *dev, enum fp_finger finger);
 void fp_print_data_free(struct fp_print_data *data);
 size_t fp_print_data_get_data(struct fp_print_data *data, unsigned char **ret);
 struct fp_print_data *fp_print_data_from_data(unsigned char *buf,